I’ve been trying to do something similar (see this thread Using CouchbaseLite inside a custom Framework / iOS8). Trying to use CBL in a swift custom framework for example but I haven’t managed to make it work. Are you using cocoapods with swift or objc? The framework would be called something like CBL utils to be used across several projects. A first step would be to get it to work without cocoapods I think. Have you manage to do that?
James